A Porotherm clay block home will give you the very best of European building precision and innovation, offering everything your home should be. The walls in your Porotherm home are 100% natural clay, with absolutely no synthetic or toxic materials and substances used either in the manufacturing process or the end product. As a result, there is no toxicity present and no VOCs (Volatile Organic Compounds) outgassing over time, as occurs with timber frame construction.
Porotherm is a breathable walling system – the clay blocks, natural lime plaster and mineral paint finish creates air movement at a microscopic level, ensuring a dry and fresh indoor environment and an accompanying air quality all-year-round.
With a block thickness of 250mm and R-values* between 1.7 – 5.4, the thermal mass in the walls of your Porotherm home provides warmth in winter and cooling in summer to create an all-year-round living temperature of between 18-22C. With low energy & maintenance requirement and an economic and fast building time and cost per m2, Porotherm competes equally with high-end timber frame construction. It truly is ‘one wall does it all’.

For more information about Porotherm Clay Block Range… Click Here
Porotherm R25 Th+ Clay Block
Porotherm R25 Th+ Clay Block
Porotherm R25 Column/ Portal Clay Block
Porotherm R25 Lintel Clay Block
Porotherm Clay Block R15
Porotherm Clay Block R15
Porotherm Clay Block R25Th+, R15 and R25 Column
Porotherm Clay Block R25 Column, R15 and R25 Lintel

Porotherm Clay Block in Brief

Affordable Icon

Cost Effective Build Price

Finished wall price per m2 competes with high-end timber-frame construction.
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High Future Value

Low maintenance and low energy costs will give a yearly high capital return.
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Multi-Purpose Use

Porotherm clay block is ideal for all building types.
Ecological Icon - Stellaria NZ


Porotherm is 100% natural pure kiln-fired clay. No toxicity, synthetics or nasties.
Breathable Icon

Fresh & Clean

Porotherm keeps the air inside your home fresh, it allows air to ‘permeate’ and move back and forth through the block walls.
Sustainable Construction Icon

Sustainable Construction

Porotherm uses 95% less water and produces 45% less waste than concrete construction.
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Thermal Efficiency

Designed as a thermometric regulator, Porotherm keeps an even 18-22C indoor temperature.
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Fire Resistance

Porotherm is non-combustible and achieves an A1 fire-resistance rating.
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Sound Proof

Thick walls provide a peaceful private living environment.
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Moisture Management

No condensation, humidity, mould or dampness – completely dry.
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Earthquake Proof

Design-engineered to meet the world’s highest seismicity requirements.
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Low Maintenance

Near-zero maintenance required for years to come.
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Easy & Simple to Install

Block laying time can be 4x faster than traditional masonry.
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Porotherm clay blocks have a design life of at least 150 years.
Declare Accredited Icon

Declare Accredited

100% organic – no Volatile Organic Compounds (VOC).

Wienerberger Porotherm in Numbers

Different types of Porotherm blocks*

Largest Porotherm block*

Lightest Porotherm block*

Heaviest Porotherm block*

*Available in New Zealand.

Brochures, Catalogues and Additional Information
Click on the image to download

Stellaria Porotherm (PDF)

Wienerberger Porotherm – NZ Products (PDF)

Wienerberger Porotherm Brochure (PDF)

Porotherm R25 Th+ (PDF)


CLIMAmur 30 (PDF)

CLIMAmur 36 (PDF)

CLIMAmur 42 (PDF)

Browse past, current and future projects here in New Zealand… See More
Stellaria NZ - Wienerberger Porotherm Projects - Karapiro Boathouse

Karapiro Boathouse

Stellaria NZ - Wienerberger Porotherm Construction Clay Block - New Zealand Project Building Site - Taupo Project - HomeStar

Taupo Project

Stellaria NZ - Wienerberger Porotherm Construction Clay Block - New Zealand Building Site Project Te Awamutu 450x450

Te Awamutu

Stellaria NZ - Wienerberger Porotherm Construction Clay Block - New Zealand Putaruru Building Project 450x450


East Tamaki Project

East Tamaki

Martinborough Project


Rototuna Project


Stellaria NZ - Wienerberger Porotherm Projects - New Plymouth 450x450

New Plymouth

Stellaria NZ - Wienerberger Porotherm Projects - Karapiro Project 450x450

Karapiro Project

Stellaria NZ - New Zealand Project - Mangawhai Wienerberger Porotherm Clay Block Construction - November 2018

Mangawhai Project

Hawkes Bay Porotherm Project

Hawkes Bay Project

400x400 New Zealand Block House - StellariaNZ - Wienerberger Porotherm Clay Block Construction - Construction Site - Queenstown

Queenstown Project